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References: [ +from:johnf@futurenet.co.za: 121 ]

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41. [AMPS] Feedthrough power - a question (score: 1): Author: johnf@futurenet.co.za (John Fielding); Date: Fri, 21 May 1999 16:25:39 +0200; An interesting comment was passed this week on the reflector about the feedthrough power from the driver having to be added to the calculated output power to arrive at the total power - or something; /archives//html/Amps/1999-05/msg00262.html (7,809 bytes)
42. [AMPS] WTD: HP spectrum analyser spares (score: 1): Author: johnf@futurenet.co.za (John Fielding); Date: Fri, 28 May 1999 17:19:12 +0200; On behalf of an amateur here in ZS I am looking a replacement 1st Mixer assy for a HP8555A rf plug-in. The model covers 10 MHz to 18 GHz and uses harmonic mixing. Seems his mixer has high conversion; /archives//html/Amps/1999-05/msg00328.html (7,309 bytes)
43. [AMPS] Alpha 91b Metering Question (score: 1): Author: johnf@futurenet.co.za (John Fielding); Date: Sat, 29 May 1999 08:49:12 +0200; I don't know the amp in question but from your description I think I know what is going on. I suspect from the power meter readings you are getting the meter reads peak power. If so it is fairly easy; /archives//html/Amps/1999-05/msg00335.html (9,882 bytes)
44. [AMPS] B&W PT2500 (score: 1): Author: johnf@futurenet.co.za (John Fielding); Date: Mon, 5 Apr 1999 15:55:26 +0200; Truly a classic case of a "for the lack of a half-penny worth of tar the ship sank". Why are some designers so obstinate? Everyone can learn from others experience. John ZS5JF -- FAQ on WWW: http://; /archives//html/Amps/1999-04/msg00078.html (10,494 bytes)
45. [AMPS] Parasitic suppressors/another question, (score: 1): Author: johnf@futurenet.co.za (John Fielding); Date: Thu, 8 Apr 1999 14:02:31 +0200; -- To: <amps@contesting.com> Then how can the neon glow orange as you stated if no drive is applied? Surely this must be a test with drive applied. And if it is with no drive applied and the neon glo; /archives//html/Amps/1999-04/msg00153.html (11,870 bytes)
46. [AMPS] collins 30L1, worth the bucks (score: 1): Author: johnf@futurenet.co.za (John Fielding); Date: Thu, 8 Apr 1999 18:42:10 +0200; Don't forget the Vincent, Velocette and the BSA (bits stuck anywhere) they poured oil out. Just as well the North Sea oil came on stream around that time!! John ZS5JF -- To: <amps@contesting.com> --; /archives//html/Amps/1999-04/msg00161.html (9,841 bytes)
47. [AMPS] collins 30L1, worth the bucks (score: 1): Author: johnf@futurenet.co.za (John Fielding); Date: Fri, 9 Apr 1999 16:18:56 +0200; A so called "total-loss system"! John ZS5JF -- To: <amps@contesting.com> -- FAQ on WWW: http://www.contesting.com/ampfaq.html Submissions: amps@contesting.com Administrative requests: amps-REQUEST@co; /archives//html/Amps/1999-04/msg00184.html (8,377 bytes)
48. [AMPS] TRW PT6702 or PT6747? (score: 1): Author: johnf@futurenet.co.za (John Fielding); Date: Wed, 21 Apr 1999 18:10:57 +0200; PT was one of the prefixes used for TRW RF parts (others were J0 and MRA), some were custom parts but the vast majority were for general sale. I can't say I recognise the numbers listed but they may; /archives//html/Amps/1999-04/msg00372.html (9,111 bytes)
49. [AMPS] Ripple current ratings of high voltage caps. (score: 1): Author: johnf@futurenet.co.za (John Fielding); Date: Thu, 4 Mar 1999 18:40:57 +0200; A thread which has been going on for a few days now deserves some added points. The original question was whether some caps advertised for sale were suitable for high voltage power supply duty in amp; /archives//html/Amps/1999-03/msg00085.html (11,244 bytes)
50. [AMPS] Care and Feeding etc. (score: 1): Author: johnf@futurenet.co.za (John Fielding); Date: Thu, 4 Mar 1999 19:56:14 +0200; I suspect that since this book is long out of print and from comments made in the last few days is still a much sought after item that it might be time to write a new version for the amateur populati; /archives//html/Amps/1999-03/msg00090.html (7,684 bytes)
51. [AMPS] Sanyo capacitors (score: 1): Author: johnf@futurenet.co.za (John Fielding); Date: Sat, 6 Mar 1999 14:36:17 +0200; If anyone is interested I now have the 1999 CD ROM from Sanyo with all their products data in pdf format. I can look up info on electrolytics from them if needed. John ZS5JF -- FAQ on WWW: http://www; /archives//html/Amps/1999-03/msg00124.html (6,608 bytes)
52. [AMPS] Ripple current ratings of high voltage caps. (score: 1): Author: johnf@futurenet.co.za (John Fielding); Date: Sat, 6 Mar 1999 20:00:31 +0200; HI Rich - from Nichicon catalog for the GQ series, the leakage current for a 470uF @ 450V should be less than 1380uA to remain in spec. Probably a worst case but over 1mA still seems a bit high. And; /archives//html/Amps/1999-03/msg00127.html (12,442 bytes)
53. [AMPS] Ripple current ratings of high voltage caps. (score: 1): Author: johnf@futurenet.co.za (John Fielding); Date: Sun, 7 Mar 1999 09:55:18 +0200; Gee Carl - if I knew where to find the CD web site I would do that. Anyway if you believe the topic is exhausted I will stop trying to help the others!! John ZS5JF -- To: <amps@contesting.com> To: <a; /archives//html/Amps/1999-03/msg00139.html (15,097 bytes)
54. [AMPS] misc topics (score: 1): Author: johnf@futurenet.co.za (John Fielding); Date: Thu, 18 Mar 1999 20:36:19 +0200; Amen - and what about Finnigans Antenna Wax? Rub it on your favourite yagi and get an extra dB of gain and lower QRN!! I joke not, some character here did a roaring trade for a few years selling it t; /archives//html/Amps/1999-03/msg00430.html (10,740 bytes)
55. [AMPS] Unitrode & Microsemi PIN diodes (score: 1): Author: johnf@futurenet.co.za (John Fielding); Date: Mon, 22 Mar 1999 16:21:55 +0200; Microsemi data can be found at their web site. (http://www.microsemi.com). I have the latest CD rom if anyone gets stuck. John ZS5JF -- FAQ on WWW: http://www.contesting.com/ampfaq.html Submissions:; /archives//html/Amps/1999-03/msg00546.html (7,143 bytes)
56. [AMPS] Amp opinion/infomation requested ASAP!! (score: 1): Author: johnf@futurenet.co.za (John Fielding); Date: Tue, 30 Mar 1999 18:09:47 +0200; Hi - a lot of antenna tuners are in fact high pass networks, so instead of providing suppression of harmonics you do the opposite!! John ZS5JF -- To: <amps@contesting.com> -- FAQ on WWW: http://www.c; /archives//html/Amps/1999-03/msg00693.html (10,842 bytes)
57. [AMPS] 3-500Z filament voltage (score: 1): Author: johnf@futurenet.co.za (John Fielding); Date: Mon, 1 Feb 1999 18:50:07 +0200; Go buy some lead underpants!! John ZS5JF -- To: <amps@contesting.com> royanjoy@ncn.net high limits--not have to return damage boosted QRO side -- FAQ on WWW: http://www.contesting.com/ampfaq.html Sub; /archives//html/Amps/1999-02/msg00032.html (8,531 bytes)
58. [AMPS] HV Switching Supply (score: 1): Author: johnf@futurenet.co.za (John Fielding); Date: Mon, 1 Feb 1999 18:46:08 +0200; What about rfi filtering? No good having such a supply if it wipes out most of the hf spectrum!!! John ZS5JF -- To: <amps@contesting.com> ESR's. the be have <5%, applications. construction. and vario; /archives//html/Amps/1999-02/msg00033.html (13,709 bytes)
59. [AMPS] FW: Mail failure (score: 1): Author: johnf@futurenet.co.za (John Fielding); Date: Mon, 1 Feb 1999 18:59:36 +0200; Nope - keep getting it as well? John ZS5JF -- To: <amps@contesting.com> -- To: <amps@contesting.com> some continuing going http://www.contesting.com/km9p/search.htm -- FAQ on WWW: http://www.contesti; /archives//html/Amps/1999-02/msg00034.html (12,985 bytes)
60. [AMPS] 8877 (score: 1): Author: johnf@futurenet.co.za (John Fielding); Date: Wed, 3 Feb 1999 16:45:34 +0200; A long time ago I designed a driver for a Henry 2kW amplifier used by a university in the UK. They needed to operate on 13.410MHz for tests to do with the killing of cancer cells in the human blood.; /archives//html/Amps/1999-02/msg00100.html (7,774 bytes)

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